1 /*
2 * Quicktime Planar RGB (8BPS) Video Decoder
3 * Copyright (C) 2003 Roberto Togni
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * QT 8BPS Video Decoder by Roberto Togni
25 * For more information about the 8BPS format, visit:
26 * http://www.pcisys.net/~melanson/codecs/
27 *
28 * Supports: PAL8 (RGB 8bpp, paletted)
29 * : BGR24 (RGB 24bpp) (can also output it as RGB32)
30 * : RGB32 (RGB 32bpp, 4th plane is alpha)
31 *
32 */
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37
42
43
46
49
52
55
58 {
61 int buf_size = avpkt->
size;
63 const unsigned char *encoded =
buf;
64 unsigned char *pixptr, *pixptr_end;
65 unsigned int height = avctx->
height;
// Real image height
66 unsigned int dlen, p, row;
67 const unsigned char *lp, *dp, *ep;
69 unsigned int planes = c->
planes;
70 unsigned char *planemap = c->
planemap;
72
75
76 ep = encoded + buf_size;
77
78 /* Set data pointer after line lengths */
79 dp = encoded + planes * (height << 1);
80
81 for (p = 0; p < planes; p++) {
82 /* Lines length pointer for this plane */
83 lp = encoded + p * (height << 1);
84
85 /* Decode a plane */
86 for (row = 0; row <
height; row++) {
87 pixptr = frame->
data[0] + row * frame->
linesize[0] + planemap[p];
88 pixptr_end = pixptr + frame->
linesize[0];
89 if (ep - lp < row * 2 + 2)
91 dlen =
av_be2ne16(*(
const unsigned short *)(lp + row * 2));
92 /* Decode a row of this plane */
93 while (dlen > 0) {
94 if (ep - dp <= 1)
96 if ((count = *dp++) <= 127) {
97 count++;
98 dlen -= count + 1;
99 if (pixptr_end - pixptr < count * planes)
100 break;
101 if (ep - dp < count)
103 while (count--) {
104 *pixptr = *dp++;
105 pixptr += planes;
106 }
107 } else {
109 if (pixptr_end - pixptr < count * planes)
110 break;
111 while (count--) {
112 *pixptr = *dp;
113 pixptr += planes;
114 }
115 dp++;
116 dlen -= 2;
117 }
118 }
119 }
120 }
121
126 if (pal) {
129 }
130
132 }
133
134 *got_frame = 1;
135
136 /* always report that the buffer was completely consumed */
137 return buf_size;
138 }
139
141 {
143
145
147 case 8:
150 c->
planemap[0] = 0;
// 1st plane is palette indexes
151 break;
152 case 24:
155 c->
planemap[0] = 2;
// 1st plane is red
156 c->
planemap[1] = 1;
// 2nd plane is green
157 c->
planemap[2] = 0;
// 3rd plane is blue
158 break;
159 case 32:
162 /* handle planemap setup later for decoding rgb24 data as rbg32 */
163 break;
164 default:
168 }
169
171 c->
planemap[0] = HAVE_BIGENDIAN ? 1 : 2;
// 1st plane is red
172 c->
planemap[1] = HAVE_BIGENDIAN ? 2 : 1;
// 2nd plane is green
173 c->
planemap[2] = HAVE_BIGENDIAN ? 3 : 0;
// 3rd plane is blue
174 c->
planemap[3] = HAVE_BIGENDIAN ? 0 : 3;
// 4th plane is alpha
175 }
176 return 0;
177 }
178
188 };